Lee Carter arrives back in Walford to surprise his mum on her birthday – and Mick Carter wants to wrap him up in a box (Picture: BBC)

The EastEnders mystery surrounding Lucy Beale’s murder deepens next week as a sheepish Lee Carter reveals a shocking secret about the night she died.

Lee, played by Danny-Boy Hatchard, returns to the Square next week to surprise his mum Linda Carter (Kellie Bright) for her birthday.

But a few too many drinks and he ends up letting slip to his dad Mick (Danny Dyer) that he knows more about Good Friday then he originally let on.

After surprising his mum in a cardboard box, enjoying a spot of Spice Girls karaoke and having a few beers with his family, Lee is heard mumbling about doing something stupid the night Lucy was murdered.

Lee finally gives in and tells his mum and dad the truth about what he knows (Picture: BBC)

Mick is left worried when he goes to confront his lad the following morning but he is nowhere to be found.

However, the truth always outs and that’s exactly what happens when Lee finally returns home to his concerned parents at the Queen Vic.

These scenes will air on Thursday July 10 at 7.30pm and Friday July 11 at 8pm on BBC1. EastEnders continues tonight on BBC1 at 8pm.